JPH0118681Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to blocks used as structures on railway tracks. Specifically, the blocks are laid at the end of the ballast trackbed to prevent ballast from flowing out and to function as a walking surface for people involved in railway construction. This invention relates to a block for preventing ballast leakage.

Recently, this type of block for preventing ballast leakage has been proposed, such as the block proposed by the present inventor (Utility Application No. 50-146988, Utility Model Publication No. 55-20830), but it is still insufficient in terms of earthquake resistance. I cannot say that it is.

Therefore, this invention proposes a ballast outflow prevention block that is firmly fixed to the roadbed and can accurately prevent the outflow of ballast in the event of an earthquake. A support wall 2 for ballast support is erected midway toward the rear of the upper surface, and the upper surface of the floor plate main body 1 on one end side of this support wall 2 is used as the walking surface 3, and the upper surface of the floor plate main body 1 on the other end side. is used as the ballast accumulation surface 4, and a long leg 7 to be buried in a hole 6 formed by digging the roadbed 5 is made to protrude from the rear end on the ballast accumulation surface 4 side of the bottom surface of the paving plate main body 1. This is a block to prevent ballast leakage.

Examples of the ballast outflow prevention block according to this invention will be described below.

The leg 7 does not project entirely from the rearmost end, but partially.

This is because the blocks for preventing ballast outflow according to this invention are laid by connecting blocks of the same type in series, so when the legs 7 are fully protruded from the extreme end, the holes 6 will cause the roadbed 5 to form a series of grooves. Although it is necessary to excavate a large amount of stable roadbed, if the leg 7 is partially protruded from the extreme end, only the part of the roadbed 5 that should correspond to the leg 7 is removed. This is because the holes 6 can be formed by digging the holes 6, that is, the holes 6 can be provided at regular intervals in the roadbed, so that softening of the roadbed due to digging can be further reduced. .

Further, water such as rainwater can properly flow out from the portion 8 from which the leg 7 does not protrude.

Further, the support wall 2 is provided with drainage holes 9, and the ballast accumulation surface 4 is arranged at an outward angle of the ballast accumulation surface 4 so that water flowing onto the ballast accumulation surface is properly guided to the drainage holes 9. Part 10 to drain hole 9
It is a slope that slopes downward.

Further, the walking surface 3 is provided with a drain groove 11 for draining water drained from the drain hole 9 to the outside.

In addition, spikes 12 are provided on both ends of the bottom surface of the floor plate main body 1 on the side of the walking surface 3, respectively.

In the figure, reference numeral 13 indicates a male part for connecting the blocks, and reference numeral 14 indicates a female part thereof, which are formed alternately on both sides of the floor plate main body 1.

Next, a construction method for installing the ballast outflow prevention block according to this invention on an existing railway track will be explained.
The process of excavating the roadbed portion 18 up to 7 and the step of excavating the roadbed portion 18
and forming a hole 6 in which the leg 7 is to be buried, and adding sand and crushed peas 19 to the excavated roadbed portion 18.
etc., laying the bed plate main body 1 on the laid sand, crushed peas, etc., and burying the legs 7 in the holes 6; The construction is performed by a step of depositing ballast 15a on.

As shown in FIG. 2, the ballast outflow prevention block according to this invention constructed as described above has the ballast 15a deposited on the ballast accumulation surface 4 and is supported by the support wall 2, and also supports the road bed 5. A leg 7 is buried in a hole 6 formed by digging and is laid at the end of a ballast track bed 15.

The ballast outflow prevention block according to the invention thus installed is placed on the ballast accumulation surface 4.
Since the ballast 15a is deposited thereon and the elongated legs 7 are buried in the holes 6 of the road bed 5, movement of the floor plate main body 1 due to the force exerted by the ballast 15a on the support wall 2 is appropriately prevented. In particular, in this case,
Since the long legs 7 protrude from the rearmost end of the bottom surface of the deck board main body 1 on the ballast accumulation surface 4 side, the distance 20 of the roadbed 5 from the legs 7 to the roadbed slope 17 is long, and therefore the distance of the legs 7 is long. The force for movement toward the roadbed slope 17 side is sufficiently supported by this long distance 20 of the roadbed 5.

In addition, since the support wall 2 is erected midway toward the rear of the upper surface of the floor plate main body 1, the area on the ballast accumulation surface 4 becomes narrower and the amount of ballast deposited decreases by the distance to the rear. The stability of the block for preventing ballast outflow due to the narrowed area is sufficiently covered by the long legs 7 buried underground. With these functions, it is possible to form a walking surface 3 with a wide area, and in addition, it is possible to reduce the cutting portion at the end of the ballast track bed 15 during construction.

Furthermore, if the legs 7 protrude from the middle of the bottom of the bottom plate body 1, it is difficult to fill the gap between the legs 7 and the inner wall of the hole 6 after the bottom plate body 1 is installed. As mentioned above, in this block for preventing ballast outflow, the legs 7 protrude from the extreme end of the bottom surface of the bottom plate body 1, so that the legs 7 and the inner wall 6a of the hole 6
The gap 21 between the two can be easily filled.

As described above, the block for preventing ballast outflow according to this invention can be installed firmly fixed to the roadbed 5, so it can sufficiently prevent the outflow of ballast and the collapse of the ballast track bed 15 during an earthquake. It has much better earthquake resistance than conventional blocks of this type.

[Brief explanation of the drawing]

The drawings show an embodiment of the block for preventing ballast outflow according to this invention, and FIG. 1 is a perspective view, and FIG. 2 is a sectional view showing the construction state. Main symbols in the diagram: 1...Bed plate body, 2...Supporting wall, 3...Walking surface, 4...Ballast accumulation surface, 5
...roadbed, 6...holes, 7...legs.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) A support wall 2 for ballast support is erected near the rear part of the upper surface of the bottom plate body 1, and this support wall 2
The upper surface of the footboard body 1 on one end side is the walking surface 3.
Then, the upper surface of the paving plate main body 1 on the other end side is used as the ballast accumulation surface 4, and the long legs 7 to be buried in the holes 6 formed by digging the road bed 5 are set as the ballast accumulating surface 4 on the bottom surface of the paving plate main body 1. A block for preventing ballast leakage, which is characterized by protruding from the rear end of the side. (2) The block for preventing ballast outflow as set forth in claim (1) of the utility model registration, wherein the legs 7 partially protrude from the rearmost end of the bottom surface of the bottom plate main body 1 on the side of the ballast accumulation surface 4.